Got another vintage Breitling Identification question from a visitor… any help would be appreciated! The question goes like this:

“I recently purchased this ladies Breitling watch that I am trying to find information on. Here are the markings I can see on it: It has a very unique gold case 7/8″ square (art deco looking) marked PLAQUE G 20. The dial face is 1/2″ Dia and is marked with a stylized B BREITLING GENEVE SWISS it is black with gold markings and hands.

The back looks like steel and is marked with the stylized B BREITLING 5519 on the outside and FOND ACIER INOXYDABLE 742452 MOD DEPOSE F.F.M (and some other no’s scratched in probably by a repair man that are hard to see) on the inside. There is a metal cover over the movement, the movement is marked with a stylized B and BREITLING. It has been almost impossible to find any info, any information would be greatly appreciated.”

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